Perhaps you should try some spelling variations:
thanh tieng » thanh tien, thanh tung, thanh vien
thieu xanh » chieu xanh, hieu manh, thien anh
hanh tieng » anh tieng, ban tieng, hanh trang
hoc thieu » toc thieu, hoc hien
cong dan » cong san, huong dan, cong dong
cong tan » cong tac, cong san, cong thanh

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thieu xanh - ((thanh tieng) or (hanh tieng)) viet trung ((cong dan) OR (cong tan)) van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - ((thanh tieng) OR (hanh tieng)) viet trung ((cong dan) OR (cong tan)) van ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu xanh - ((thanh tieng) or (hanh tieng)) viet trung ((cong dan) OR (cong tan)) van ban".
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - ((thanh tieng) or (hanh tieng)) viet trung ((cong dan) OR (cong tan)) van ban*.